Ethanol Reforming
Mostrando 13-21 de 21 artigos, teses e dissertações.
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13. Investimentos financeiros em projetos de celulas a combustivel e hidrogenio no Brasil / Financial investments in fuel cells and hydrogen projects in Brazil
In the last decade many countries, especially the most developed, have made substantial investments in technologies related to hydrogen and fuel cells, aiming to reduce greenhouse gas emissions and to increase energy security. In Brazil, the Federal Government through the Ministry of Science and Technology (MCT) has also made many investments in those areas,
Publicado em: 2009
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14. Study of nickel catalysts supported on modified ZrO2 applied in reforming reactions / Estudo de catalisadores de níquel suportados em ZrO2 modificados aplicados em reações de reforma
Zirconium dioxide is a material with physics and chemical characteristics that can be applied in many fields, as academic as industrial. In the catalysis, the interest in systems based on zirconia (ZrO2) are growing- up quickly, as a catalyst as a support, considering that ZrO2 properties can be changed by the addition of different cations. The objective of
Publicado em: 2008
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15. Produção de hidrogênio a partir da reforma a vapor de etanol utilizando catalisadores Cu/Ni/gama-Al2o3
Cu/Ni/gamma-Al2O3 catalysts were prepared by an impregnation method with 2.5 or 5% wt of copper and 5 or 15% wt of nickel and applied in ethanol steam reforming. The catalysts were characterized by atomic absorption spectrophotometry, X-ray diffraction, temperature programmed reduction with hydrogen and nitrogen adsorption. The samples showed low crystallini
Química Nova. Publicado em: 2007-04
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16. Desenvolvimento de catalisadores de ródio e cobalto para a reforma a vapor do etanol.
The development of technologies based on the use of biofuels has taken the attention of the scientific community, due to the current dependence on fossil fuels, which results in an increase of air pollution. This pollution increase is related to public health problems and climate changes. In this context, the use of fuel cells moved by hydrogen is a mean of
Publicado em: 2007
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17. Nanopartículas de Co suportadas em SiO2 : síntese, caracterização e propriedades catalíticas para a reforma a vapor do etanol.
Colloidal Co Nanoparticles (Co-NPs) were used to prepare supported Co catalysts. The Co- NPs were obtained by thermal decomposition of the precursor Co2(CO)8 in the presence of oleic acid and trioctylphosphine oxide (TOPO), in an inert atmosphere (Ar). The Co- NPs/SiO2 were obtained by impregnation of a colloidal suspension of nanoparticles on the support no
Publicado em: 2007
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18. "Desenvolvimento de catalisadores de rutênio suportado em CeO2/Al2O3 para a reação de reforma a vapor e oxidativa de etanol" / "CeO2/Al2O3-supported ruthenium catalysts for the steam and oxidative reforming of ethanol"
Aiming at hydrogen production, as a source of renewable energy, Ru/CeO2-Al2O3 catalysts were studied in ethanol steam reform and ethanol oxidative reforming. The effect of the support and metal/support interaction was verified on the activity and selectivity of the reactions. The supports and catalysts were characterized by x-rays dispersive spectroscopy (XD
Publicado em: 2006
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19. "ZrO2/g-Al2O3-supported platinum catalysts for the steam reforming of ethanol" / "Catalisadores de platina suportados em ZrO2/g-Al2O3 para a reação de reforma a vapor de etanol"
In this work catalysts of platinum supported on g-alumina (g-Al2O3), oxide of zirconium (ZrO2) and mixed oxide of zirconium and g-alumina had been prepared and characterized. The bi-component supports containing ( 15%) ZrO2/g-Al2O3 had been prepared by two different methods : in the first, an acid suspension of comercial oxide of zirconium was used and in th
Publicado em: 2006
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20. "Caracterização e aplicação de catalisadores de cobalto suportados em g-Al2O3 e SiO2 para produção de hidrogênio a partir da reforma a vapor e oxidativa de etanol" / "Characterization and application of cobalt catalyst supported on g-Al2O3 e SiO2 for the production of hidrogen from the ethanol steam and oxidative reforming"
Neste trabalho foram preparados catalisadores Co/Al2O3 e Co/SiO2 por impregnação com concentração metálica entre 4,0% e 20,0% e avaliados frente às reações de reforma a vapor e reforma oxidativa de etanol, com o objetivo de avaliar a estabilidade catalítica e o rendimento em hidrogênio. Os catalisadores foram caracterizados por espectrofotometria d
Publicado em: 2006
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21. Reforma a vapor do etanol sobre catalisadores de Ni e Co suportados.
The Ni and Co catalysts supported on Al2O3 and 12%La-Al2O3 and the carrier 12%La-Al2O3 were prepared by impregnation of the support with an aqueous solution of corresponding nitrates metals. The catalysts were characterized by temperature programmed reduction (TPR), specific surface area (B.E.T.) and XRay Diffraction (XRD). The reaction rate for decompositio
Publicado em: 2004